1 /*
2 * Copyright 1999,2004 The Apache Software Foundation.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.apache.commons.feedparser.locate.blogservice;
18
19 import org.apache.commons.feedparser.FeedParserException;
20 import org.apache.commons.feedparser.locate.*;
21
22 import java.util.regex.*;
23
24 /**
25 * Models the PMachine blog service, encapsulating whether a given weblog
26 * is this type of service and where it usually keeps its feeds.
27 *
28 * @author Brad Neuberg, bkn3@columbia.edu
29 */
30 public class PMachine extends BlogService {
31
32 /** A pattern used to discover PMachine blogs. */
33 private static Pattern pmachinePattern =
34 Pattern.compile("pmachine", Pattern.CASE_INSENSITIVE);
35
36 /** Returns whether we can trust the results of this blog service's
37 * autodiscovery links. For example, TextAmerica returns invalid
38 * autodiscovery results.
39 */
40 public boolean hasValidAutoDiscovery() {
41 return true;
42 }
43
44 /** Returns whether we should follow HTTP redirects for this blog service.
45 * Some services don't implement HTTP redirects correctly, while others,
46 * like Xanga, require it.
47 */
48 public boolean followRedirects() {
49 return false;
50 }
51
52 /** Determines if the weblog at the given resource and with the given
53 * content is this blog service.
54 * @param resource A full URI to this resource, such as
55 * "http://www.codinginparadise.org".
56 * @param content The full HTML content at the resource's URL.
57 * @throws FeedParserException Thrown if an error occurs while
58 * determining the type of this weblog.
59 */
60 public boolean isThisService(String resource, String content)
61 throws FeedParserException {
62 boolean results = false;
63
64 Matcher pmachineMatcher = pmachinePattern.matcher(resource);
65
66 results = pmachineMatcher.find();
67
68 return results;
69 }
70
71 /**
72 * Returns an array of FeedReferences that contains information on the
73 * usual locations this blog service contains its feed. The feeds should
74 * be ordered by quality, so that higher quality feeds come before lower
75 * quality ones (i.e. you would want to have an Atom FeedReference
76 * object come before an RSS 0.91 FeedReference object in this list).
77 * @param resource A URL to the given weblog that might be used to build
78 * up where feeds are usually located.
79 * @param content The full content of the resource URL, which might
80 * be useful to determine where feeds are usually located. This can be
81 * null.
82 * @throws FeedParserException Thrown if an error occurs while trying
83 * to determine the usual locations of feeds for this service.
84 */
85 public FeedReference[] getFeedLocations(String resource,
86 String content)
87 throws FeedParserException {
88 FeedReference pmachineLocations[] =
89 { new FeedReference("index.xml", FeedReference.RSS_MEDIA_TYPE) };
90
91 return pmachineLocations;
92 }
93 }